The aircraft.cfg file RADIOS section should be replaced with the following lines.

JUST COPY AND PASTE THE SECTION BELOW
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[Radios]
// Radio Type=availiable, standby frequency, has glide slope
Audio.1=1
Com.1=1, 0
Com.2=0, 0
Nav.1=0, 0, 0
Nav.2=0, 0, 0
Adf.1=1
Transponder.1=1
Marker.1=0

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